Rotary shaft nut of a welding mask



FIG. 1 is a top and front perspective view of a rotary shaft nut of a welding mask, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof; the right side being a mirror image;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top and front perspective view thereof, the rotary shaft nut of a welding mask applied to a welding mask showing my new design.

The welding mask is shown in broken lines for illustrative purposes only and forms no part of the claimed design. 

I claim, the ornamental design for a rotary shaft nut of a welding mask, as shown and described. 